KAST Design

Founded in 2013 by Karolina de Saint-Etienne and joined in 2016 by Kasia Kaliczka, KAST Design is a high-end interior architecture agency based in Paris, operating in France and internationally (Germany, Poland, Switzerland, etc.).
With international backgrounds, Karolina and Kasia draw on their Polish, German, and French roots to cultivate a unique sensibility. Based in Paris, they combine finesse, creativity, and elegance to design refined interiors that are open to the world and infused with cultural depth. Their technical expertise and architectural approach guide each project, affirming both their know-how and distinctive vision.
The agency is supported by a dynamic, multicultural, and multidisciplinary team of eight people, all driven by the same commitment: to create elegant and light-filled spaces where aesthetics serve comfort and functionality. This international outlook enables the agency to work confidently with numerous international clients in Paris.